Assigfoe of one-half



3 vsheets-sheet A1'.

` (No-ModelJw H. PARSHALL.-

LUBRIGATOR Patented Jem 17 I NVE. TOR

m e. h s Leu e e. h .S 3 L. L A H S Dm. A D.. H. C. u d O M 0 m LUBRIGATOR.

N6. 676,676. Patented Jan. 17, 1666.

auen?? M @ff/MM f /ff @if .Attorney N. versus. rnolvumgnpnr, washingm, D.c.

UNITED lSTATI-:s PATENT OFFICE.

CHARLES'H. PARSHALL, OF DETROIT, MICHIGAN, ASSIGNOR' OF ONE-HALE TO EDWARD GRACE, l-OF SAME PLACE.

LUBRlCAToR.

SPECIFICATION forming part of Letters Patent No. 376,676, dated January 17, 1888. A' 7 Application filed October 23, 1886. Renewed December 15, 1887. Serial No. 258.016. (No model.)

. To all whom it may concern.-

Be it known that I, CHARLES H. PARSHLALL, of Detroit, county of Wayne, State of Michigan, have invented'a new and useful Improvement in Lubricators; and I declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, 'which form a part of this specification.I v

My invention consists of the combinations of devices and appliances hereinafter specifled, and more particularly pointed'out in the claims.

In the drawings, Figure 1 represents my device as applied to a lubricator of the ordinary make and in the nature of an attachment to any lubricator. Fig. 2 represents the device as forming a part of the construction of a lubricator, and represents it in connection with that kind of a lubricator known as a double-sight-feed lubricator,77 designed to feed through two independent channels and convey the oil to two distinct destinationsas, for instance, tothe two cylinders of a locomotive. Fig. 3 is a vertical section of the oilexit conduit and its immediate connections on lineXX of Fig. 2. Fig. 4 is aplan view of the device shown in Fig. 2; Fig. 5, a view illustrating the slip-joint connection of the inlet steam-pipe. Fig. 6 is an enlarged section on the line a' x of Fig. 2, illustrating the construction of the valve F and its location on the oileXit conduit. Fig. 7 is an enlarged sectional view of the valve G and its related parts. Fig. 8 is a sectional view of the ller and its governing-valve.

Itis the purpose of my invention to provide means whereby, without the aid of any equalizing steam-conduit, any lubricator may be converted into a locomotive-cupor be adapted to operate in any situation where the conditions are similar to those upon a locomotivei. e, where the steam-passage for supplying the water of condensation is always in communication with the boiler-pressure, while the oilexit leads to the dry-pipe, steam-chest, cylinder, orA other part where the pressure luctuates or where the pressure may be entirely out off.

It is well known that in locomotives where steam is taken from the steam-dome or other the loeomotivebe on the downgrade orjust arriving ata station, or in other similar situation where the steam is cut off' from the dryt pipe by the throttle-valve, the pressure, which up to that time was substantially the same in the condenser and at the oil-exit, is now re-y lieved at the oil-exit, so that the interior of the lubricator is no longer in equilibrium as to steam-pressure. The tendency at thistime is for the steam-pressureto instantly force out from the lubricator a considerable quantityot' oil, thus not only wasting the oil, but driving the condense-water with it'from the visible feed-tubes, and causing the said tubes to become filled more or less with oil, and so destroy for a time its function as a visible-feed lnbricator. Heretofore this has been remedied by the employment of a steam-conduit connecting the steam-inlet with the oil-exit passages either within or outside the body of the lubricator. result by substantially different means, which kI willnow proceed to describe.Y s A is the oil-reservoir of an ordinary lubri-v cator; B, its condenser; C, the-steam-inlet pipey for supplying waterof condensation; D, the visible-feed chamber or water-tube; E, the oil exit conduit.

Condense-water is led from the condenser down into the oil-chamber through a conduit,

C, in the usual way. This conduit leads the l condense-water nearly to the bottom of the'oilreservoir, 'where its supply may be regulated by a valve, C3, at the base ofthe lubricator. The oil floated upward by the condense-water passes directly into the base of the sight-feed. glass, as shown in Fig. 2 of the drawings;k

Thepetcock (3r`2 isshown in the drawings as located at the base of the indicator-tube. It

may be either located at this point or in the base of the lubricator, for in either case itl would serve as an outlet for steam and water blown through the sight-feed glass for thepurpose of cleansing the latter. At this point my invention begins.

Fis a valve located ou the between the discharge end of the visible-'feed s y roo oil-exit conduit tube and the parts to be lubricated. It may be located at any point on this line, but Iprefer to locate it adjacent to the lubricator, as shown in the drawings. This valve F is provided with a valve-stem, F', and its top terminates in a disk, F2, which fits closely and moves up and down as a piston within the screw-cap F3. The upper edge of this piston or disk seats against a surface, f, of soft metal, preferably soft solder, thus making a steamtight joint. The screw-cap is perforated at f, so that the space above the piston and disk shall always be in equilibrium with the external air.

f3 is a spring located above the disk, audits tension may be regulated by a thumb-screw, f4.

The operation of the device will now be explained. It will be observed that only the extreme lower point of the valve F is exposed to the pressure from that side adjacent to the lubricator, and the tension of the spring may be so regulated that this pressure can only raise the valve to a very slight degree. On the other hand, it will be observed that the under side of the disk or piston F2 is open to backpressure from the steam-pipe or dry-pipe acting back through the oil-exit conduit. Now, if the device be placed upon a locomotive, with the top of the lubricator connected in the usual way with the steam-space of the boiler and the oil-exit connected with the drypipe, steam-chest, or cylinder, it is apparent that when theengineis running,thebackpress ure will constantly hold the valve F Wide open or entirely oil' from its seat and up against the soft-metal seat above. There will be an equilibrium within the lubricator, so that it will feed in the usual way simply by reason of the preponderance Of the hydrostatic column of condense-water. Vhen, however, the engine is going on adowngrade or just arriving at a station, and when, for this reason, pressure is relieved from the dry-pipe, steam-chest, or cylinder, the spring]c3 would at once force the valve F downward. At this moment there will be no reacting pressure, and the condition of equilibrium within the lubricator is destroyed, and there would be the pressure of the boiler to force oil from the lubricator,

The valve F has, however, neutralized this tendency, and oil can be forced out only with the speed that it can pass through beneath the valve.

It is an easy matter for an engineer, at any time steam is not on the engine, to regulate the spring f3 so that the rate of the iiow of the oil past the valve shall be just the same as the rate of iiow by hydrostatic pressure alone when the engine is running. The construction therefore is such that, whether steam is on the engine or off, the rate of flow of the oil will always be uniform, and this is accomplished without the employment .of an equalzing steam-pipe.

The preceding description relates more particularly to the device when made in the nature of an attachment to any of the usual forms of sight-feed lubricators; but the device is equally applicable when made to form a part 'of the lubricator itself. Thus, as shown in Fig. 2, it may be interposed between the oilreservoir and the condenser, and in this connection the same letters represent parts corresponding to those which have been already described in connection with Fig. l.

There is another advantage derived from the construction shown in Fig. 2, whether the same be adapted for a single or a double lubricator. The connection G is made in the form of a conduit communicating with the passage-way between the condenser and the oilreservoir and governed by a valve, G. Now, should the glass water-tubes become fouled with oil or sediment, the peteock G2 at the bottom of the glass indicator-tube or reservoir may be opened. Then by opening the valve G condense-water or live steam may be forced through the water tube or tubes, thus thoroughly cleansing them. So, also, the tubes may be swabbed out by removing the plugs H above their upper ends.

J is a filler governed by a valve, J. This is designed for use only when, by reason of the glass tubes breaking or other derangement of the lubricator, it becomes necessary to feed oil from the can. I would have it understood that it may or may not form a part of my improved attachment. I prefer, however, to so employ it, and my claim for the attachment is presumedto cover the attachment, whether with or without this independent filler.

I find it very desirable to unite the inlet steam-pipe (l with the condenser B by means of a slip -joint connection, as shown at c. C represents a valve located in said steam-pipe, the pipe C being also united therewith by a slipjoint connection, as shown at c. Heretofore this union of the steam-pipe with the condenser and the valve has been made by a rigid connection or by a ball -joint or a screw connection. Such a connection facilitates the location of the cup in place and permits a IOO IIC)

readier and freer connection. Should any mistake occur in drilling the hole in the steampipe, this construction allows due compensation therefor.

What I claim is- 1. The combination, with a lubricator, of a valve, F, located in the oil-exit passage between the visible-feed tube and the parts to be lubricated, said valve constructed to present a large surface to the back-pressure through the oil-exit conduit and to present a small surface only to the direct pressure from the lubricator, and an adjustable spring for pressing the valve upon its seat, substantially as and for the purposes described.

2. The combination, with a lubricator, of a valve, F, located in the oil-conduit between the visible-feed tube and the point to be lubricated, said valve open at its top to the external air, provided with a disk or piston, F2, and an adjustable spring for forcing the valve t0- ward its seat, the construction being such that the large surface beneath the disk is presented to the back-pressure throughthe oil-exit pipe, while a small surface only at the end of the valve is presented to the direct pressure from ,the lubricator, substantially as and for the purpose described. y

3. Thevalve F, provided with a disk or piston,.F2, the latter constructed at its upper edge to form a steam-tight joint, whereby pressure is exerted back through the oil-exit passage, in combination with a spring located above said valve, substantially as and for the purposes described.

4. The combination, in a lubricator, of the valve F in its oil-exit passage, lconstructed as described, and a steam-passage, G leading.

from the condensewater passage to the toppof the sight-.feed glass, said steam-passage governedl by a valve, whereby the visible-feed tubes can becleansed, substantially as and for the purposes described.

5. As an article of manufacture, an attach- .ment to an ordinary sight-feed lubricator, said attachment consisting of the valve F, provided with stem F', disk or piston. F2, and adjustable spring f3, substantially as described. y

-In testimony whereof yI sign this specification in the presenceof two Witnesses. Y v

CHARLES H. PARSHALL. Witnesses:

N. S. WRIGrircr, M. B. ODOGHERTY. 

